Photo-composing machine



March 10, 1931. A. T. KOPPE 1,795,653

PHOTC COMPOS ING MACHINE Filed Aug. 17. 1928 6 Sheets-Sheet l March 10, 1931, A KQPPE PHOTO COIVIPQSING MACHINE Filed Aug. 17. 1928 6 Sheets-Sheet 2 @HHHHHNHHF fl axa/zagr Z jao p az Sui/44;,

March 10, 1931.

A. T. KOPPE PHOTO COMPOSING MACHINE Filed Aug. 17, 1928 e sheetsfgheet 4 EJ751257; fiZexandaPT v a March 10, 1931; A, T; KOPPE 1,795,653

PHOTO COMPOSING MACHINE iled Aug. -17. 1928 6 Sheets-Sheet 8 Gmxa/zderlZT/Ybppe 5.

Patented Mar. 10, 1931 ALEXANDER '1. KOPPE, OF CHICAGO, ILLINOIS PHOTO-COMPOSING MACHINE Application filed August 17, 1928. Serial No. comics.

This invention relates to photo-composing machines of the type disclosed in my prior re-issue' Letters Patent of the United States No. 16,567 dated March 8th, 1927, and the purpose of the present invention is to provide a photo-composing machine of simplified form which maybe economically built and efficiently operated for transferring images from negatives or printing plat-es to the sensitized surfaces of press plate, of zinc or the like, which are employed in the ma chine. lhe principal object of the invention is to provide a photo-composing machine in which the negative carried in the frame has movement longitudinally and transversely of the machine, in combination with a bed plate adapted to carry the press plates and hav ing movement toward and from the plane of the negative. A further object of the invention is to provide a photo-composing machine of-the vacuum-pressure type comprising means for imparting movement to the negative-carrying vacuum frame and for moving a bed plate, adapted to carry the press plates, toward and from the plane of the negativecarrying vacuum frame for the purpose of establishing an initial contact of the press plates with the vacuum frame, preliminary to exhausting the air from the region between the negative and the press plates. A further object of the invention is to provide an improved carriage construction for supporting and permitting adjustment of the vacuum frame and for accurately positioning the vacuum frame in the various positions with respect to the surface of the sensitized plate and the bed plate on which this is mounted. Still another object of the invention is to provide improved means by which the'parts of the carriage may be adjusted to accommodate vacuum frames of different sizes or widths. Other objects relate to various features of construction and arrangement which will appear more fully hereinafter. 1

The nature of the invention will be understood from the following specification taken With the'accompanying drawings in which one embodiment is illustrated.

In the drawings, Figure 1 shows a top plan view of the photo composing machine of the present invention;

Fig. 2 shows a front elevation of the machine illustrated in Fig. 1;

Fig. 3 shows a partial front elevation of the bed plate of the machine and the mechanism for effecting movement thereof toward and from the vacuum frame;

.Fig. 4 is a longitudinal section taken on the line 4 4 of Fig. 1 looking in the direction of the arrow;

Fig. 5 is a transverse section taken on the line 55 of Fig. 1 looking in the direction of thearrow;

Fig. 6 shows an enlarged partial top plan view of the machine, illustrating the vacuum frame and surrounding parts, with portions thereof broken away for the purpose of illustrating the means for effecting a fine adjustment of the position of the vacuum frame transversely of the machine;

Fig. 7 shows an enlarged sectional view taken on the line 7'( of Fig. 6;

Fig. 8 shows an enlarged sectional view taken on the line 88 of Fig. 6;

Fig. 9 shows an enlarged top plan view of the means for effecting a longitudinal adjustment of one of the carriage blocks to effect an accurate positioning thereof;

Fig. 10 shows a detailed section taken on the line 1010 of Fig. 9;

Fig. 11 shows a detailed section taken on the line 1111 of Fig. 9; Y

Fig. 12 shows a detailed section taken on the line 1212 of Fig. 6 showing the means for effecting the fine adjustment of one of the register blocks to which the vacuum frame is connected;

Fig. 13 is a horizontal section taken on the line 1313 of Fig. 2 showing the mechanism for controlling the vacuum valve and lightoperating switch in connection with the means for raising and lowering the bed plate;

Fig. 14 is a detailed section taken on the line 14-14 of Fig. 13; and Fig. 15 is a detailed section taken on, the line 1515 of Fig. 13.

As illustrated in the drawings, the photo composing machine of the present invention comprise a pair of parallel side frames'20 which are supported on legs'21 connected by the longitudinal truss frames 22 and by the transverse end frames 23., The side frames 20 have the cross sections shown particularly in Fig. 5 and are provided on the upper part thereof with the horizontal flanges 24 which serve as tracks for the longitudinally movable carriage 25 upon which the vacuum frame is adapted to be mounted. The track members 24 of the side frames 20 are directly. engaged by the carriage-blocks 26 which are provided on their under sides with lon itudinal undercut grooves. 27 adapted to e en gaged by the track members 24 which are undercut on their inner sides as shown at 24 to correspond with the inclination of the undercut grooves of the carriage blocks. A. clamping shoe or plate 28 engages the vertical side of each track member 24 within one of the grooves 27 and this shoe is adapted to .be forced inwardly by a pair of set screws frame members 20 and the position of the adjacent carriage block 26 is indicated by the position 'of its pointer on the scale. Before the set screws 29 are operated to secure the carriage block in adjusted position, a precise adjustment is eflected-by means of an auxiliary carriage block 34 having the form shown .particularly in Figs. 1, 9, 10 and 11. The

block 34, having a pinion 42 secured thereon P block 34 is provided with an undercut groove 35 to engage the track 24, as shown in Fig. 11, and it is adapted to be secured in position by means of a set screw 36, the inner end of hich bears against a shoe 37 which engages the upright edge of the track member 24, this shoe'being retained in place by an underlying plate or flange 38. The set screw 36 has a handle 39 by which it may be operated and after the carriage block 26 has been moved to the approximate position desired, the auxiliary block 34 which moves therewith, is clamped in position by means of the set screw 36, after which a relative adjustment of the main carriage block 26 is efiected with respect to the block 34, before tl1e set screws 29 are operated to secure the block 26in place. Fine adjustment of the main carriage block 26 with respect to the auxiliary carriage block 34 is brought about by means of an adjusting screw 40 which threadedly engages a boss 41 formed on the main carriage block 26 and which is rotatably mounted in the carriage between the bearings 43 which are carried by the auxiliary czirriage blocks. This pinion meshes with a worm'44 which is secured on an ad usting shaft 45, rotatably mounted in bearings carried in the upper part of the auxiliary carriage blocks and provided on its are adapted to carry a pair of parallel register bars 48 which extend transversely of the machine with their ends secured in place on the blocks 26 as hereinafter described. These register bars 48 have register blocks 49 mouirted to slide thereon, the blocks 49 being undercut as shown at 50 in Fig. 7, and being retained in place by means of the plates 51 which are secured to the blocks andunderlap the lower surfaces of the register bars. The register blocks 49 may be secured in adjusted position on the register bars 48 by means of set screws 52 which bear against the shoes or clamping plates '53 mounted Within the grooves of the blo cks as shown in Fig.-7.- The register bars 48 are provided with graduations 55 and the positions of the blocks 49 on the bars 48 may beiietermined 'by reference to -an index marked 56 carried adjacent the end of each register block. Before the adjusting screws 52 are operated to clamp the register blocks 49 in position, a fine adjustment of the position of the carriage block with respect to this graduated scale 55 is effected by means of an auxiliary register block 58 which is mounted on its associated register bar 48, as shown in Fig.

12, being secured in position by means of an adjusting screw 59 bearing against the clamping plate or shoe 60. The screw 59 has an operating handle 61 and after the block 58 has been secured in adjusted position, the main register block 49 is adjusted on the bar with respect to the fixed block 58 by the operation of the adjusting screw 52 shown particularly in Fig. 6. This screw threadedly engages a boss 63 formed on the main register block and is rotatably. mounted in the auxiliary register block 58 while it is provided with a fixed pinion 64 adapted to mesh with a worm 65 mounted on the adjusting shaft 56 which is journaled in the auxiliary register block and provided with a knurled operating handle 57. By operating the handle 57, the indexscale carried by the main register block 49 may be brought into accurate position with respect toa desired one of the graduations 50.

Each register bar 49 is provided adjacent each end thereof with aninwardly extending plate 68 carrying an upwardly extending 0st 69. These posts are adapted to receive the ends of the supporting bars 70 which are of L-shaped cross section having their lower engaging holes in the negative frame.

flanges directed inwardly to serve as tracks for rollers carried by the vacuum frame 71. This vacuum frame is provided at four points with hangers 72 provided with rollers 73 which are adapted to travel on the flanges of the track bars to permit the adjustment of the vacuum frame 71 transversely of the machine in a direction at right angles to the adjustment of the carriage longitudinally of the machine on the side frames 20. The supporting posts 69 are provided with slots 69 to receive the ends of the supporting bars 70 and these bars may be removed to permit the insertion and withdrawal of the vacuum frame 71 which normally extends beneath these bars at its edges, as shown in Fig. 1. The register block 49 carried by one of the register bars 48 is provided with an inwardly extending flange 74 having an upwardly extending dowel pin 75 mounted thereon to engage and closely fit a hole 76 formed in the outwardly extending flange of the vacuum tank. At the other side of the vacuum frame, there is provided a fixed projecting tongue 77 adapted to engage a notch 78 formed in the jaw plate 79 which is secured to the other register block 49. By this means, the vacuum frame 71 is connected to both of the register blocks 49 and is adapted to move therewith when these register blocks .are adjusted on the bars 48, the vacuum frame being supported during this movement by the rollers 73 which rest on the flanges of the supporting bars 70. The

vacuum frame is provided on the right angularly disposed sides with other holes 76 and a tongue 77 to engage the pin 75 and the notch 78, respectively, when the vacuum frame is turned to a right an ular position. The inwardly extending ange 71 of the vacuum frame 71 is adapted to support a rectangular negative frame 80 which is secured in position by means of dowel pins 81 held by the vacuum frame and The negative frame 80 is provided with clamping members 82 adapted to be operated by adjusting members 83 to permit the clamping in this frame of a negative 85 carrying the image or design which is to be reproduced, photographically, on the sensitized plate. Thevacuum frame 71 is provided on its under side with a continuous rectangular sealing flange 86 of rubber or the like which is adapted to engage the surface of the press plate to form an air seal throughout the periphery of the vacuum frame and an air channel 87 is provided on the inner side of this lower sealing flange to permit the exhaustion of the air from the region within the sealing flange 86. This air channel 87 has communication through a pipe 88, projecting from the upper part of the vacuumframe as shown in Fig. 1, with a flexible suction tube .89 which.

leads to the exhaust pipe 90 having connection with an air ump by which the air may be exhausted. 'I b permit the exhaustion of the air from the region beneath the negative plate 85, there is rovided a rectangular sealing frame 91 havlng the form shown particularly in Figs. 6, 7, and 8. This frame 91 comprises four metallic members 92 which are flexibly connected at their meeting ends to form a rectangular structure which is mounted on the upper side of a channelshaped member 93 of rubber or the like of rectangular outline having one rectangular flange 94 to rest on the upper surface of the negative plate 85 and another continuous flange 95 to rest on the upper surface of the inwardly extending flange 71 of the vacuum frame, thus forming an air seal between the negative and the vacuum frame so that when the vacuum system is in operation and connected to the vacuum frame, the air will be exhausted from the region beneath the negative and it will thus be forced by atmospheric pressure into close contact with the sensitized plate. The vacuum frame is preferably provided with handles 96 and the sealing frame is preferably provided with handles 97 to permit these parts to be readily inserted into I or withdrawn from the carriage of the machine.

To permit of a variation in the spaced relation of the register bars 48 and of the supporting bars 70, the bars 48 are capable of being located in different positions on the carriage blocks 26, thus allowing different sizes of vacuum frames to be inserted in the machine between the register blocks 49. For this purpose, the register bars 48 are provided at one end with downwardly extending pinslOO adapted to engage any one of a series of holes 101 which are formed in the carriage block 26 at the forward side of the machine. At the other side of the machine, the register bars 48 are provided with depending lugs 102 of rectangular outline adapted to engage any one of a number of grooves 103 which are formed in the upper side of the other register block 26, a clearance 104 being provided at the end of the lug 102, to allow for expansion or contraction. After the bars 48 have been located in the desired spaced relation, they may be secured in position on the carriage blocks 26 by means of clamping bolts 105 having enlarged heads vacuum frame is adapted to travel in its ad-.

'justment transversely of the machine.

The adjustment of the carriage longitudinally of the machine on the side frames 20 is effected by means of a pair of endless chains 110 which are mounted on sprocket wheels 111 secured on the shafts 112 and 113 by means of bolts 114 which extend downwardly through the carriage blocks and engage the members 115 to which the sprocket chains are attached, as shown in Fig. 8. Each of the shafts 112 and 113 is provided at its forward end with a squared portion 116 adapted to be engaged by a handle117. The handle 117 is placed on the shaft 113 when it is desired to move the carriage 25 toward the right as viewed in Fig. 1 and when the operator wishes to move the carriage in the reverse direction, the handle is placed on the shaft 112 so that the upper stretch of the chain exerts a pulling action on the carriage in effecting movement thereof. The sprocket chains are connected to the carriage blocks at both sides of the machine, and even adjustment of both ends of the carriage is effected.

The sensitized late upon which the impressions carried y the negative are to be photographically reproduced, is adapted to be carried by a bed plate 120, the principal portions of which are preferabl formed of wood for the sake of lightness o wei ht and economy of construction. This bed p ate 120 has a fiat horizontal upper surface and is mounted on a number of transversely extending wooden members 121 which are carried by the metallic supporting beams 122 of T- shaped cross section. As shown in Fig. 5, these T-beams are connected at their ends to the longitudinally extending angle, bars 123 and each angle bar 123 is carried by a bar 124 which is secured thereto and which extends edgewise upwardly therefrom. These bars 124 are adapted to beadjusted vertically for the purpose of moving the bedplate 120 toward and from the position occupied by the vacuum frame 71. The bed plate 120 has a rubber blanket 125 secured thereon by means of clamps 126 located at its edges thereof and the sensitized press plate 126, shown particularly in'Figs. 7 and 8, is adapted to rest directly on the upper surface of this rubber blanket with its edges secured in place by means of adhesive tape 127, the

strips of which overlap the edges of the sensitized plate and adhere to this plate and to the surfaceof the rubber blanket. The sensitized press plate is thus held in a sufiicient- 1y fiat position to permit a close contact to be obtained between the sensitized surface of.

structure at each side of the machine is the same and each bar 124 is supported by a pair of links 130 carrying rotatably mounted rollers 131 which are adapted to travel in longitudinal slots 132 formed in the bar 124. The

ends of these links 130 are pivotally supported oh pins 133 Which are carried by'the side frame members 20 of the machine and it will be apparent that when the links are oscillated about these pins 130, the bars 124 and the bed plate are raised or lowered depending upon the direction of movement. This rocking motion of the links 130 is effected through a longitudinal bar 134 which is connected to the pivots of both of the rollers 131 and also to-the pivot of a central roller 131 Which is mounted on the upper end ofa lever 135 mounted to rock about a pivot pin 136 se-- cured to the side frames. The roller 131 travels in the central slot 132 formed in the bar 124 and when the lever 135 is rocked about its pivot the motion is transmitted through the bar 134 to both of the links 130. The bar 124 is guided inits movement by means, of the guide members 137 which are secured to the frame of the machine and arranged to engage guideways 138 which are darried at the ends of the bar 124. The bar 134 at each side of the machine is operated by a connecting rod 139 having its other end pivotally connected at 140 to a crank arm 141 fixed on a shaft 142. This shaft 142 extends transversely of the machine, being journaled. in bearings 143 secured to the undersides of-the side frames, and it is adapted to be rocked in its bearings by the operating handle 144. By operating the handle 144 at the front side of the machine, the bars 134 and the" connected mechanism at the front and rear sides of the'machine are simultaneously operated to effect the uniform raising or lowering of all parts of the bed plate 120. In order to insure against the operation of the bed plate and the vacuum frame when the vacuum is on, through any operation of the handle 144, means are provided for connecting the operating mechanism of the bed plate with means for controlling the exhaustion of air from the vacuum frame. The pipe 90 leading from a suction pumpto the vacuum frame is provided with an air valve 150 which may be operated to cause the air to be exhausted from the vacuum frame or to close the connection to the pipe 90 from the suction pump and establish an opening to the atmosphere from the vacuum frame. This valve 150 and its operating connections are shown more particularly in Figs. 2 and 13 where the pipe 90 is shown leading from the valve 150 into which the pipe 90' from the exhaust pump is connected. The valve 150 is operated by the rotation of a shaft 151 and this rotation is effected by means of a crank handle 152. When the handle 152 is operated to open the valve 150, a connection is established between the pipes 90 and 90 per-- mitting the vacuum pump to exhaust the air from the vacuum frame. Also when the crank handle 152 is actuated, an electric switch 155 is simultaneously operated to turn on the electric lights (not illustrated in the drawings) which are located above the photo-composing machine in position to cause light to shine downwardly through the negative and thereby form an exposure of the negative on the sensitized plate. This electric switch 155 which is, connected in the lighting circuit is operated by a plunger 156 and this plunger is in turn adapted to operate by a cam 157 mounted on the shaft 151. The shaft 151 also hasmounted thereon a crank arm 158* having its lower end connected to a link 159 with the crank arm 1 14 on the shaft 142. The connection of the link 159 with the crank arm 144 is effected through a pin 160 engaging an elongated slot 161 formed in thelink 159. While the handle 144 is in the left hand position shown in Fig. 3, corresponding to the elevated position of the bed plate 120,

the operator is permitted to move the handle pies a dead-center position so that the connecting link 159 cannot be moved toward the left, as viewed in Figs. 2 and 3, until the handle 152 is again returned to its upright position. This prevents the operating handle 144: being moved from the position shown in Fig. 3, corresponding to the upper position of the bed plate 120, while the suction line is in operation and while the illuminating means are in operation.

For the purpose of covering those portions of the sensitized plate which are not located beneath the vacuum frame and negative, a pair of curtains 165 are provided to extend inwardly between the side members of the carriage 25. As shown in Fig. 8, these cur" tains are mounted on rollers 166 having their ends mounted on the register'bars 48 of the carriage and the inner ends of these curtains are attached at 166" under the longitudinal edges of the vacuum frame 71 so that when the vacuum frame is moved transversely of the machine on the supporting bar 70, the

curtains 165 automatically wind or unwind on the spring operated rollers 166 and thus maintain the desired portions of. the sensitized plate protected against the action of the light rays. Similar curtains 167 are mounted on rollers 168 at the ends of the bed plate and they have their inner ends attached at 169 to plates 170 which are secured to the undersides of the register bars 48 and which extend laterally therefrom in both directions When the carriage 25 is moved longitudinally of the machine, the curtains 167 wind or unwind on the spring operated rollers 168 and thus cover up portions of the sensitized plate at the sides of the carriage.

In the operation of the machine, the operator places the sensitized press late 126 in position on the blanket 125 of rubber or other somewhat resilient material and after the sensitized plate has been secured in placemoved transversely of the machine until the scale readings indicate that the vacuum frame and negative are in the desired position with respect to the surface of the sensitized plate. The operator then actuates the operating handle 144 to elevate the bed plate 120 which causes the upper surface of the sensitized plate to engage the downwardly projecting sealing flange 86 of the vacuum frame 71 with the result that an air seal is established between the vacuum frame and the sensitized plate around the outer edges of the vacuum frame and with the further result that the vacuum frame is elevated so that the rollers 7 3 are lifted out of engagement with the track member 70, leaving a clearance 171 as shown in Fig. 7. The operator then actuates the handle 152 to turn on the vacuum and to establish a circuit through the illuminating means. The exhaustion of the air with the creation of a resulting vacuum or partial vacuum beneath the vacuum frame 71, causes the atmospheric pressure to effect further compression of the outer sealing flange 86 of the vacuum frame sothat the negative 85 and the bed plate 126 are permitted to come into close contact with each other under the influence of atmospheric pressure. The clearance 171 before the vacuum is turned on should be sufiicient to permit this clearance to continue in a small amount after the vacuum has established a close contact of the negative and press plate. Due to the interlocking connection between the suction operating means and the bed plate operatin sary for the operator, a er the exposure has been made, to close the valve 150 in the sucmeans, it is necesfrom the vacuum frame to the atmosphere,

before the operator is permitted to lower the bed plate by the operation of the handle 144.

Although one form of the invention'has been shown and described by way of illustration, it will be understood that it may be constructed in various other embodiments within the scope of the appendedclaims,

I claim:

1, The combination in a photo-composing machine, of a negative carrying frame, a

..block movable in said machine and connected with said frame, an auxiliary block adapted to move with said first named block, screwthreaded means for effecting relative adjustment of said block, and means for independently clamping each of said blocks in adj usted position.

2. The combination in a photo-composing machine, of a supporting frame, a pair of carriage blocks mounted to travel on said frame, a negative frame mounted on said carriage blocks, a pair of auxiliary blocks slidably mounted on said frame, screw threaded means for connecting each of said auxiliary blocks with one of said first-named blocks, means for clamping said auxiliary blocks in position, and graduated means for indicating the positions of said carriage blocks.

3. The combination in a photo-composing machine, of "a pair of carriage blocks, guides on which said carriage blocks are adapted to travel, register bars connecting said carriage blocks, means for adjusting the spaced rela tion of said register bars on said carriage blocks, supporting posts carried by said register bars, supporting bars carried by said posts, and anegative carrying frame mounted on said supporting bars.

4. The combination in a photo-composing machine, of a pair of carriage blocks, guides on which said carriage blocks are adapted to travel, register bars, connecting said carriage blocks, means for adjusting the spaced relation of said register bars on said carriage blocks, supporting posts carried by said regis ter bars, supporting bars carried by said posts, a negative carrying frame mounted on said supporting bars, and a bed plate adapted to carry a press plate, and means for moving said bed plate to cause said press plate to engage a part of said negative carrying frame and thereby move said negative carrying V framefrom its position supported by said supporting'bars. I

5. The combination in a photo-composing machine, of a frame. having parallel. side frame members, a pair of carriage blocks each mounted to travel on one of said side fram members, means for independentl clamping each of said blocks to its si e frame member, a pair of carriage bars extendmg betweensaid. blocks, and a negative 'when said holes.

carrying frame slidably mounted on said carriage bars for movement transversely to said side frame members.

6. The comb nation in a photo-composing machine, of a pair of parallel side frame members, a pair of carriage blocks each slidably mounted on one of said side frame members, an auxiliary carriage block mounted on each side frame member adjacent one of said carriage blocks, means for clamping said auxiliary carriage blocks to said side frame members, means connecting each auxiliary block with the adjacent carriage block to effect a fine relative adjustment thereof, carriage bars extending between opposite carriage blocks, a negative carrying frame movable transversely of said machine along said carriage bars, and means for adjusting said said carriage blocks, means for clamping said auxiliary carriage blocks to said side frame members, means connectlng each auxiliary .block with the adjacent carriage block to efiect a fine relative adjustment thereof, carriage bars extending between opposite carriageblocks, a negative carrying frame movable transversely, of said machine alon said carriage bars, means for adjusting sai carriage bars and said blocks longitudinally of said machine on said side frame members,

' and means for independentlyZ clamping each of said carriage blocks inits side frame member.

' 8. The combination in machine, of a ed position on a photo-composing pair of parallel side frame members, a pair of carriage blocks each" mounted to travel on one of said side frame members, a pair of carriage bars exte'ndm between said carriage blocks, means carrie by said bars and said blocks for detachably securing the ends of said bars on said blocks in any one of a plurality of differentspaced relations, and a negative carrying frame connected with and movable along said carriage bars transversely of said machine.

9. The combination in a photo-composing machine, of a pair of parallel side frame members, a pair of carriage blocks each mounted to travel along one of said side frame members, a pair of carria e bars excarriage blocks having a plurality of holes therein, pins carried by the adjacent ends of said carriage blocks and adapted to engage a selected pair of said holes, and means for clamping said bars to said last named block pins are in engagement with said tending between. said carriage b ocks, said 10. The combination in a photo-composing machine, of a pair of parallel side frame members, a pair of carriage blocks each mounted to travel along one of said side frame members, a pair of carriage bars extending between said carriage blocks, said carriage blocks having a plurality of holes 'therein, pins carried by the adjacent ends of said carriage blocks and adapted to engage 10 a selected pair of said holes, means for clamping said bars to said last named block when said pins are in engagement with said holes, the other of said carriage blocks having re-- cesses therein elongated transversely of said machine, lugs formed on the ends of said bars opposite said pins for engagement with said recesses, means for engaging a selected pair of said recesses, means for clamping said last named ends'of said bars to said other carriage block with said lugs engaging two of said recesses, and a negative carrying frame mounted on said carriage bars. a

11. The combination in a photo-composing machine, of a side frame member, a carriage block mounted to move along said side frame member, a pair of carriage bars overlapping and extending transversely to said carriage block, said carriage block having a plurality of recesses therein elongated transversely of said side frame member, a pair of lugs each formed on one of said bars to engage a pair of said recesses and permit a limited relative movement of said bars longitudinally thereof with respect to said block, and means for clamping said bars in position on said block with said lugs engaging any selected pair of said recesses.

In testimony whereof, I have subscribed my name.

40 ALEXANDER T. KOPPE. 

